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1) An amplidyne can give which of the following characteristics ? a. Constant current b. Constant voltage c. Constant current as well as constant voltage d. Constant current, constant voltage and constant power e. None of the above
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2) In a control system integral error compensation _________________ steady state error? a. increases b. minimizes c. does not have any effect on d. any of the above
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3) A differentiator is usually not a part of a control system because it______________? a. reduces damping b. reduces the gain margin c. increases input noise d. increases error
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4) When the initial conditions of a system are specified to be zero it implies that the system is________________? a. at rest without any energy stored in it b. working normally with reference input c. working normally with zero reference input d. at rest but stores energy
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5) When the initial conditions of a system are specified to be zero it implies that the system is______________? a. at rest without any energy stored in it b. working normally with reference input c. working normally with zero reference input d. at rest but stores energy
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6) A phase lag lead network introduces in the output_______________? a. lag at all frequencies b. lag at high frequencies and lead at low frequencies c. lag at low frequencies and lead at high frequencies d. none of the above
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7) Which of the following devices is used for conversion of co-ordinates ? a. Microsyn b. Selsyn c. Synchro-resolver d. Synchro-transformer
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8) Which of the following is the definition of proportional band of a controller ? a. The range of air output as measured variable varies from maximum to minimum b. The range of measured variables from set value c. The range of measured variables through which the air output changes from maximum to minimum d. Any of the above e. None of the above
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9) Which of the following can be measured by the use of a tachogenerator ? a. Acceleration b. Speed c. Speed and acceleration d. Displacement e. None of the above
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10) In order to increase the damping of a badly underdamped system which of following compensators may be used ? a. Phase-lead b. Phase-lag c. Both A. and B. d. Either A. and B. e. None of the above
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11) In a system low friction co-efficient facilitates___________? a. reduced velocity lag error b. increased velocity lag error c. increased speed of response d. reduced time constant of the system
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12) An increase in gain, in most systems, leads to_____________? a. smaller damping ratio b. larger damping ratio c. constant damping ratio d. none of the above
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13) A conditionally stable system exhibits poor stability at______________? a. low frequencies b. reduced values of open loop gain c. increased values of open loop gain d. none of the above
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14) The type 1 system has _________ at the origin? a. no pole b. net pole c. simple pole d. two poles
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15) The frequency and time domain are related through which of the following ? a. Laplace Transform and Fourier Integral b. Laplace Transform c. Fourier Integral d. Either B. or C.
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16) Spring constant in force-voltage analogy is analogous to_____________? a. capacitance b. reciprocal of capacitance c. current d. resistance
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17) Static error coefficients are used as a measure of the effectiveness of closed loop systems for specified ___________ input signal? a. acceleration b. velocity c. position d. all of the above
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18) The type 2 system has __________ at the origin? a. no net pole b. net pole c. simple pole d. two poles
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19) Velocity error constant of a system is measured when the input to the system is unit ___________ function? a. parabolic b. ramp c. impulse d. step
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20) If a step function is applied to the input of a system and the output remains below a certain level for all the time, the system is_____________? a. not necessarily stable b. stable c. unstable d. any of the above
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